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GAMs to identify the form of the functional relationship between the log BMI at 6 years and the explanatory variables. (A) There is a linear relationship with full breastfeeding (r = 1); There is a nonlinear relationship (r >/ = 2) with (B) maternal pregestational BMI (C) infant weight gain and (D) maternal alcohol consumption. BMI, body mass index; GAM, generalized additive model.
